Machine for gluing strips edge to edge



A. ELMENDORF. MACHINE FOR GLUING STRIPS EDGE TO EDGE.

APPLICATION FILED VJULI! I9. 1920.

2 SHEETS-SHEET I.

' 'lv/@gl .IIIIIIIIIIIIIHIIy MACHINE FOR GLUING STRIPS EDGE T0 EDGE vAPP|.|c.\T|ol\1 FILED 1uLY 19.1920.

2 SHEETS-SHEET 2.

the work projecting laterally from between the members l and 2 and press them toward the longitudinal center of the machine, that is toward each other. 'lhese pressure rolls are conveniently arranged' in groups ol tour,

each group comprising two upper rolls, lll,` lying on oppositel sides ot the members l and 2 and close to the latter, together with two lower rolls, 15, each lying just below and cooperating with one of? the members le. rlhe pressure rolls are so disposed that their axes are not quite parallel with the axes of the feed rolls, the axes ot all of the pressure rolls -on each side of the machine being parallel with each other but making an angle slightly greater than ninety degrees with the longitudinal axis ot the machine, and the two sets or pairs of rolls being syn?- metrically disposed relatively to the longitudinal axis olib the machine; the larger angle between the axes ot the two pairs of each group being toward `the iront ot the ma.-

chine.

, The result ot' this constructionis that when two strips oit veneer,l such as indicated at and E in Figs. 3 and l, are Jfed between the endless bands by the leed rolls, glue having first been applied to the ed es to be joined, the marginal portions ol the strips will be dattened and brought into registration with each other by the members l and 2 and the bands, andthe protruding portions otJ the strips will be gripped between the pressure rolls; the movement of the strips causing the pressure rolls-to rotate and exert a distinct pressure on each of the strips in the lateral direction toward the longitudinal center of the machine. 'lhus the effect of the pressure rolls on the strip, A, as viewed in F ig. d, is lto force this strip toward the right while the pressure rolls acting on. the strip B tendto force it toward the left. The surfaces to be glued together are therefore accurately aligned yand pressed y into intimate contact with each other while at the same time the heat from the steam chests l and 2 penetrates the joint, permitting the glue to .set under the influence oit heat and pressure. l

The inner faces of the Hexible endless bands are thoroughly oiled so as to maintain a film ot oil between each band andthe correspondingy steam chest. Consequently, as the work passes throughthe machine, the frictionI between the work and the bands is much greater than between the latter and the steam chests, so that the band moves along with the work. Any glue that oozes out of the joints adheres to the bands instead of to the steam chests and, by wiping the bands manually at some point or points where their working faces are exposed, they may be kept clean without making it neces sary to stop the machine itor the purpose of removing accumulations of glue.

i ,assess The parts which l have heretofore described niay be assembled upon any suitable frame structure which will hold them in proper relation to each other. ln the arrangement shown, there is a base, i6, from which rise standands, 17, on which the lower pressure rolls, l5` and the member l are supported. There is also an upper hori- Zontal beam, 18, parallel with the members l and 2 and supported from the base by suitable iframe members, 19. rllhe upper pressure rollers, l, are journaled in downs wardly-opening bearings, 2G, in the lower ends pedestals. 2l, projectingdownwardly from the upper beam. Suitable be provided for the endless bands. Thus, in the arrangement shown, there are guide wheels, 22 and 23, at the ends of the mein'- bers l and 2 respectively; similar guide wheels, 24, at the ends ot the base for receiving and guiding' the depending portion ol' the lower band; and still another set of wheels or guides, 25, at'the ends of the top member, 18, of the frame, these latter wheels or guides engaging and directing the upper portions ont the upper endless band. All these features are, however, mere details of design, the principle of my inventionbeing embodied in what may be termed the yieldable heating and clamping elements and the means associated therewith' for exerting latera'l pressure on two strips being fed through the heating and clamping means.,`

While have illustrated and described with particularity only a single preferred form of my invention, l do not desire to be limited to the exact structural details. thus illustrated 'and described; but intend to cover all forms and arrangements which come within the terms employed in the denitions oit my invention constituting the appended claim Y ll claim:

l. ln a machine of the character described, two parallel work-engaging members one of which bears yieldingly toward the other and adapted to engage opposite faces ot two strips lying edge to edge between them,

i means independent of said members for feed? ing such strips between the latter, and means at opposite sides of said members for engaging the said strips and pressing them lati orally toward each other.

2. ln a machine of the character described, two parallelheated work-engaging members one of which bears yieldingly toward the other, said members being adapted to engage the opposite faces of two strips lying edge to edge between them, means independent of said members lor feeding such strips between saidmernbers, and means at opposite sides of said members for engaging the said strips and pressing them laterally toward each other.

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3. .ln a machine of the character described,

'lill lying one above i ,escena two parallel elongated members' lying one above the other and one bearin yieldingly toward the other,two endless flexible strips of metal each loosely surrounding one of said members, the lower strip 'having its upper run lying upon the lower of said members, and the upper strip having its lower run lying upon and extending in the same direction as the upper run of the lower strip., t, ln a machine of the character described, two stationary elongated parallel memberslying one above the other and one bearing yieldinglytoward the other, two endless imperforate thin bands of metal each Yloosely surrounding one of said members,

the lower band having its upper run lying upon the lower of said members and extending lengthwise thereof, the upper band having its lower run lying upon and eX- tending in the same direction as the upper run of the lower band, and means for feeding worlr between said bands. Y

5. ln a machine of the character described, two elongated parallel members the other and one bearing yieldingly toward the other, the faces of said members which are directed toward each other beinx smooth and continuous, two smooth endless hands each loosely surroundsaid members, the lower band having its upper run lying upon the lower of said members and eirtendingwin the direction of the length of the latter, and the upper band having its lower run lying upon ing one of and extending in the same direction as the upper run of the lower band.

ti.. ln a machine of the character described, two elongated parallel members lying one above the other and one bearing yieldingly toward the other, the faces of said members which directed toward each other being smooth and continuous, two smooth endless bands each loosely surrounding one of said members, the lower band having its upper run lying upon the lower of said members and extending in the direction of the length of the latter, and the upper band having its lower run lying upon and extending in the saine direction as the upper run of tne lower band, and means independent of said members and said bands for feeding work between said bandso 7. ln a machine of the character described, two long narrow steam chests lying one above the other end held against lengthwise movements, one of said chests bearing yieldingly toward the other, feed rolls for feeding two strips engaging with each other at their edges between said steam chests, and means at opposite sides of said steam chests for engaging with said strips and pressing them inwardly toward each other.

stri/ps and to be rotated thereby, said pressure rolls having their axes arranged at a slight angle to the feed rolls in the direction to exert a lateral pressure on the strip en gaged thereby and force it toward the other strip.

9. ln a machine of the character described, two long narrow steam chests lying one above the other and held against lengthwise movements, one of saidchests bearing yieldingly toward the other, two endless flat strips of metal each loosely surrounding one of' the chests, one of said strips having its upper run extending len `thwise across the top of the lower chest an the other strip having its lower run extending lengthwise below the i bottom of the upper chest, the parts being so constructed and arranged that there will be less friction between each strip and the corresponding chest than between the strips and work passing through the machine between said strips, and means for feeding work to be rlued between those portions of the strips lying between the chests.

l0. ln a machine of the character de-l scribed, a long narrow rigid stationary steam chest having a smooth upper surface, a second long narrow steam chest lying above the stationary chest and adapted to rest thereon when the machine is empty, the bot` tom of said second chest being tlexiblmand means for feeding strips to he glued between said chests.

ll. ln combination, a long'narrow station ary steam chest having a smooth upper surface, a second long narrow smooth-bottomed steam chest lying above and parallel with the first chest, the second chest being movable in the vertical direction and being adapted to be supported by the lower steam chest when the machine is empty, flexible narrow endless metal bands loosely surrounding said steamchests, one of said bands having its upper run lying on top of the lower chest and extending lengthwise thereof, the other band Vhaving its lower run extending lengthwise underneath the upper chest, and means for feeding sheets to be glued between those por* tions of the bands lying between the steam chests.

ln testimony whereof, l sign this specification.

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